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  • Map
    Sketch of the two breakwaters above Alexandria in the Red River, Scale ca. 1:2000. LC Civil War Maps (2nd ed.), 241 "M. Section VIII.66." Detailed map showing upper and lower dams, falls, "Tennyson's channel," "De Russy's Channel," and some relief by hachures. Description derived from published bibliography. Available also through the Library of Congress web site as raster image.
    • Contributor: Gerdes, F. H. - De Russy, Lewis G.
    • Date: 1864